Feed box for roller mills



(No Model.) y2 sheets-sheet 1.

J. M. OASE. FEED BOX FOR ROLLER'MILLS. No. 297,764. Patented AprQZQ. 1884.

ATTEST 2 Sheets-'Sheet 2.

(No Model.)

Patented Apr. 29

MIMI

4lm/ENTDFL UNITED -I STATES PATENT v OFFICE. i,

JOHN M. CASE, OF COLUMBUS, OHIO, ASSIGNOR TO THE CASE MANUFAC- TUBING COMPANY, OF SAME PLACE.

FEED-Box FOR ROLLER-MILLS.

SPECIFICATION forming part of Letters Patent No. 297,764, dated April 29, 1884.

Application mea December 1o, ieee. (No model.)

- silience to resist the action lof an eccentric or cam and impart a counter movement to said box, as hereinafter described and claimed.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in which- Figure 1 is a vertical section of a rollermill with my improved box applied, the section being taken at right angles to the rolls. Fig. 2 is a perspective view of my improved feed-box removed. Fig. 3 is a side elevation of the complete machine, showing the means for adjusting the rolls. Fig. 4 is a perspective View of the lower section of the journalbox of the movable roll. Fig. 5 is a longitudinal section of the link for regulating the distance asunder of the rolls.

1 represents the side of the ca'sing, which is cast at top with a flange in which are formed the lower parts of the bearings or boxes for the fixed rolls of the mill, and for the shaft employed for vibrating the feed-box.

2 3 and 2 3 are two pairs of rolls, the inner ones being thestationary rolls, having bearings in boxes partly cast in the case 1, the outer rolls being theadjustable or movable ones and having bearings in boxes formed on the upper ends of rocking supports 4. The arm of each support extends through an opening in the iiange of the plate 1, and is fitted at its lower end in a concave seat in a block, 5, which is supported by a screw, 6, having bearings in a lug, 7, formed on the case. By this means the rolls may be leveled by simply adjusting the screw 6 up or down, as may be necessary. The lower part of each box 4 is formed with two anges or cheeks, 4, between 5o through the medium of a follower-block, 11,

lin an opening, 12, in the link 8 against an eccentric lug, 13, on the end of a transverse shaft, 13, in the manner already described in my application No. 96,699, filed on the 31st of May, 1883. The pairs of rolls each comprise one smooth roll, 2, and one toothed, milled, or corrugated roll, 3, either of which may be used as the stationary or movable roll, as found Y desirable.

14 represents the feed-box, which is con- 65 by elastic straps or spring-hangers 16, which 7o are preferably formed oi' steel springs, one end of each of which is fastened to a corner of the box, and the other coiled and attached to suitable xed parts of the frame, the springs on the opposite sides of the box being coiled in opposite directions, so as to keep it normally in a central position. I prefer to employ coiled springs, as they possess many important advantages over straight ones, among which may-be mentioned that, by reason of the greater length of the piece of metal e111- ployed, a coil-spring will allow a more uniform freedom of movement to the box and be less liable to snap than a straight one, all other things equal. l

Attached to the bottom of the box is a lug, 17, against which works a revolving eccentricshaft, 18, having its bearings cast in the apexes of the side plates, 1, as already described, and driven by a suitable pulley on the outside of the machine. This shaft runs through the machine parallel with the rolls, and serves to impart motion to the box 14, which is resisted by the spring-hangers 1G. The material is fed to the box 14 from a hopper, 19, of any suita-v bleY construction, placed above it onthe top of the machine.

It will be seen that by the use of a feeding apparatus constructed as above described an equal and uniform quantity of material will be fed to each pair of rolls.

The ease of the machine is provided with doors 20 and 21, for inspecting` the feed and the product as they fall from the rolls, respectively.

I do not claim in this application the lug 1T, nor "brid,g,fes15,7 nor the combination of a duplex feed-box with two pairs of rolls,7 nor means for imparting motion to the eecentrie 18,77 for the reason that they are all claimed in my application No. 96,699, filed on the 31st of May, 1883.

The rocking support 4, which has the lower section of the journal-box for the movable roll formed thereon, is not claimed in this application; but the right is hereby reserved to claim it in a subsequent application.

I am aware that it is not new to employ Hat springs to support seves, &e., by endwise compression, and do not claim such as my invention.

Having` thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

1. The combination, in a roller-mill, of a feed-box, means for imparting motion thereto in one direction, and spring-hangers for suspending it and producing a counter movement, substantially as set forth.

2. In a roller-mill, the combination cfa feedbox, coil-spring hangers for suspending said box, and means for imparting motion thereto, as set forth.

3. In a roller-mill, the combination, with a feed-box, of suitable springs coiled in opposite directions for suspending said box, and. means for imparting motion thereto, as set forth.

4, In a roller-mill, the combination of a feedboX, a cam-shaft for imparting motion thereto in one direction, and spring-hangers for suspending said box and imparting a counter movement thereto, substantially as set forth.

JOHN M. CASE.

1Witnesses:

OoTAviUs KNIGHT, L. M. HoPKINs. 

